IPA: /vɪkˈtɔːrɪəsli/
KK: /vɪkˈtɔrɪəsli/
In a way that shows success or victory.
The team celebrated victoriously after winning the championship.
Victorious is formed from "victor" (from Latin "victor", meaning conqueror or winner) and the suffix "-ious" (meaning full of or characterized by). The word "victoriously" means in a manner that is full of victory or characterized by triumph.
Think of a 'winner' ('victor') and remember that 'victoriously' means acting in a way that shows triumph.